[4.2.6] - Unable to save/edit articles with umlauts in filenames during frontend editing

[tgurr]

Steps to reproduce the issue

Using frontend editing. Try to edit an existing article or create a new one and add for example a picture with umlauts in its file name. This only appears to affect frontend editing, the same works fine when editing the article in the backend as administrator.

1. Add a picture
   
2. Pick a picture with umlauts
   
3. Try to save the article
4. Experience the following error:

It's reproducible when creating a new article just consisting of the following code:

<p><img src="dateien/103/images/jubiläum_november_2015.jpg" alt="jubilaeum november 2015" style="margin: 5px 20px;"></p>

When first renaming the file replacing umlauts the same works fine.

Expected result

No error - work like before in Joomla 3.x

Actual result

Experience a timout/fatal error

System information (as much as possible)

From Joomla system information:

• Database: 10.5.18-MariaDB
• Database charset: utf8_general_ci
• Database connection charset: utf8mb4_general_ci
• PHP: 8.0.26 (but also reproducible on 7.4.33)
• Default Cassiopeia template
• JCE Editor

Additional comments

This wasn't an issue and worked fine before in Joomla 3.x before upgrading to Joomla 4.x. Raising the PHP execution timeout also doesn't help as the PHP-FPM process is taking 100% CPU no matter how long it runs until running into the timeout/error.

[ReLater]

Could you please test with TinyMce? To confirm that it is a Joomla core issue.

[tgurr]

Apparently this issue has already reported before #39193 and would be fixed by joomla-framework/filter#50 if it would be merged instead of the bugreport just being closed as completed where it is NOT. Found this after searching for another problem and stumbling upon https://www.joomlacontenteditor.net/support/forum/109751-photo-filename-with-umlauts-cannot-save-article which mentioned the bugreport and the PR (and that it's also reproducible on TinyMCE).

[deltapapa01]

Hello,
I can confirm the bug!
I have tested it with a different editor, template and language.
However, the articles can be saved as Super User, everything below (so as Admin) does not work. So after pressing save nothing happens, no error output at all.
I use Joomla 4.3 and PHP 8.2.0

Hope #39193 will be reopen!

WBR,
deltapapa

[richard67]

Closing as having a pull request. Please test #41451 . Thanks in advance.